Hello, my husband had a concussion almost 5 years ago and was diagnosed with post concussion syndrome shortly after that. He has been doing much better over the last 4 years but has definitely struggled with depression and anxiety from time to time. The last two days he has been feeling lightheaded, nauseous, and just can't seem to do anything. Getting him out of bed has been a struggle. Do you think this is related to depression? He was recently trying to lower his dose of citalopram and I am wondering if he shouldn't have done that? We called the doctor to see if he could switch back to his usual dosage. Can depression have physical symptoms? I just want to make sure I help him the best I can.